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y NO- 433,38l Patented July 29,1890. l vt "l 'E5 y Q WITNESEEE: INVENTDR:

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UNITED STATES PATENT OFFICE.

JOHN T. WILLIAMS, OF MOUNT VERNON, NEW YORK, ASSIGNOR TO THE INTERNATIONAL PORT-ELECTRIC COMPANY OF NEWv YORK, N. Y.

ELECTRO-MAGNETIC TRANSMITTER.

- Application filed October 24,1889.

SPECIFICATION forming part of Letters Patent No. 433,381, dated July 29, 1890.

Serial No. 328,088. (No model.)

To all whom it may concern.-

Be it known that I, JOHN T. WILLIAMS, a citizen of the United States, residing at Mount Vernon, in the county of Westchester and State of New York,have invented new and useful Improvements in Electro-Magnetic Transmitters, of which, the following is aspecitication.

This invention relates to certain improvero ments in that class of electro-magnetic transmitters which I have described in Letters Patent No..342,666, dated May 25, 1886, and No. 396,792, dated January 20, 1889; and the invention consists in the novel combinations r 5 anddeviceshereinafter described and claimed, reference being made to the accompanying drawings, illustrating my invention, in which- Figure 1 represents a longitudinal central zo section in the plane x Fig. 2. Fig. 2 is a plan or top View.

Similar letters indicate corresponding parts.

In the drawings, the letters A A A2 designate a series of helices, which are wound upon z 5 spools of wood or other non-conductor of electricity.

Bis a track, which extends through the several helices, and is made of brass or any other suitable non-m agnet-ic substance. The helices 3o are firmly mounted at intervals apart upon a suitable bed B', and through the flanges of the spools containing the helices A A A2, &c., extends an electric conductor C, which is insulated from the Vtrack B and from the helices. This conductor connects by a wire 11 with one pole of a dynamo P or other generator of electricity, and the track B is connected by a wire 10 with the other pole of said dynamo. 0n each of the helices is mounted 4o a circuit-closer, consisting of a magnet D D D2, respectively, which extends in the direction of the length of the helix and the track, and can swing freely about a pivot d, arranged in a metallic base c, one of which is secured to the flange of each helix. The magnet may 5o D D D2for instance, that marked n in the drawings-is located a contact-piece e, which may consist of a spring-arm secured to the fia-nge of the respective helix. The magnet D can be perfectly balanced, so that it normally lies in a horizontal position; but in order to insure a more prompt and quick action of the magnet, I weight the arm s of the magnet or make it of suiiicient length to overhalancc the arm n, so that the magnet' is normally in an inclined position and the arm n 6o is out of contact with the contact-piece e. The same effect can be produced by subjecting one arm of the magnet to the action of a spring. The base o of the magnet D is connected with one end of the helix, the opposite end of said helix being connected to the track B, and the contact e is connected by a wire 12 with the electric conductor C, whereby a current is established through the respective helix whenever the magnet D closes the circuit 7o at the contact e.

The carriage E, whichis moved on the track B by axial magnetism orsuction of the helices A A A2, is permanently magnetic, it being made of hard steel for this purpose. The p- 7 5 posite poles of this carriage are marked N and S, respectively, and itis intended to move in the direction of arrow l, marked thereon in Fig. l. Then the end of the carriage enters one of the helices, say helix A, its south 8o pole S repels the south pole s of the magnet D, thereby causing said magnet to turn about its pivot and to close the circuit at the contact-piece e, so as to vitalize the helix A. The carriage is then drawn forward by the axial magnetism of this helix until its center comes opposite the end s of the magnet D, when this magnet returns to its normal position. From this description it will be seen that the successive helices are not vitalized until the for- 9o ward end of the carriage enters the same, and if the movement of the carriage is rapid the helices have hardly time to become vitalized, so as to produce a propelling action upon the carriage. It is therefore desirable to vitalize each successive helix some time before the carriage enters the same. This object is attained by supplementary circuit-closers,which consist of magnets Du Dil', mounted on pivots f0 fo', which have their bearingslip bracket-s roo g0 g', and the poles of which are marked n0 s". The brackets go 9' are secured on blocks F F', which are of wood or other non-conductor of electricity, and firmly secured between the lianges of the helices A A' A2, and on these blocks are secured contact-pieces e e0', which connect by wires 13 with the electric conductor-C, while the brackets g0 gl connectby wires 14 with the bases c of the magnets D D. When the carriage E moves on the track B and its south pole S reaches the position indicated by a dotted line in Fig. 1,the north pole n0 of the magnet D0 is attracted, and a circuit is established through the helix A some time before the forward end of the carriage enters said helix. As soon as the south pole S of the carriage enters the helix A, the regular circuitfcloser D also closes acircuit through this helix, and this helix is enabled to produce a propelling action upon the carriage without fail.

In the example shown in the drawings the .regular as Well as the supplementary circuitclosers consist of magnets which are actuated by the magnetic action of the carriage; but it will readily be understood that the circuitclosers could be actuated by simple contact with a non-magnetic carriage in the manner shown in my patent, No. 396,792.

What l claim as new, and desire to secure by Letters Patent, is-

'1, The combination, with a series of helices A A, &c., a track B, extending through said helices, and a carriage C, of a series of regular circuitclosers D D D2 and a series of supplementary circuit-closers D0 D0', all actuated by the advancing carriage and connections between the circuit-closers and the helices with a generator of electricity, substantially as described.

2. In port-electrics, the combination,with a series of helices and atrack extending through the same, of a series of circuit-closers arranged between the helices and connectedllp in series to one coil and in multiple arc to the succeeding coil, substantially as described.

3. In port-electrics, the combination, with a series of helices and a track passing through the same, of a series of regular circuit-closers and a series of supplemental circuit-closers, thc latter series being arranged to alternate with the' irst, and being connected up in series with one coil and in multiple arc with the succeding coil, substantially as described` In testimony whereot` I have hereunto set my hand in the presence of two subscribing y witnesses.

JOHN T. WILLIAMS.

Witnesses:

FRANK LAWToN, J. VAN SAN'rvooRD. 

